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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Re: [Xen-users] Slow domU network (even within domU)]
hello, thank you but that didn't help neither. another strange observation i made is when do i an iperf within the domu i get the following results: iperf to localhost 2.8 gbit iperf to domu-real-ip 200 mbit (see results at the end). ciao, artur Server listening on TCP port 5001 TCP window size: 85.3 KByte (default) ------------------------------------------------------------ VM_OTRS:~# iperf -c 192.168.70.50 ------------------------------------------------------------ Client connecting to 192.168.70.50, TCP port 5001 TCP window size: 64.0 KByte (default) ------------------------------------------------------------ [ 3] local 192.168.70.50 port 41309 connected with 192.168.70.50 port 5001 [ 4] local 192.168.70.50 port 5001 connected with 192.168.70.50 port 41309 [ 3] 0.0-10.0 sec 239 MBytes 200 Mbits/sec [ 4] 0.0-10.0 sec 239 MBytes 200 Mbits/sec VM_OTRS:~# iperf -c 127.0.0.1 ------------------------------------------------------------ Client connecting to 127.0.0.1, TCP port 5001 TCP window size: 64.0 KByte (default) ------------------------------------------------------------ [ 3] local 127.0.0.1 port 56978 connected with 127.0.0.1 port 5001 [ 4] local 127.0.0.1 port 5001 connected with 127.0.0.1 port 56978 [ 3] 0.0-10.0 sec 3.25 GBytes 2.79 Gbits/sec [ 4] 0.0-10.0 sec 3.25 GBytes 2.79 Gbits/sec Am Donnerstag, den 09.03.2006, 09:14 -0500 schrieb Himanshu Raj: > You will have to tune your TCP parameters like window sizes etc. I don't have a > ready ref on this - but try the following settings in your domU. > > Following sysctl parameters must be tuned in order to get gigE bw from domUs. > Either set via sysctl -w or put in /etc/sysctl.conf. > > # increase TCP maximum buffer size > net.core.rmem_max=16777216 > net.core.wmem_max=16777216 > > # increase Linux autotuning TCP buffer limits > # min, default, and maximum number of bytes to use > net.ipv4.tcp_rmem="4096 87380 16777216" > net.ipv4.tcp_wmem="4096 65536 16777216" > > -Himanshu > > On Wed, Mar 08, 2006 at 02:27:29PM +0100, Artur Schiefer wrote: > > hello philipp, > > > > this is my xentop output when i am runnig the test. do you achieve > > higher rates (should only be limited by memory throughtput). > > > > ciao, > > artur > > > > xentop - 14:21:58 Xen 3.0.1 > > 2 domains: 1 running, 0 blocked, 0 paused, 0 crashed, 0 dying, 0 > > shutdown > > Mem: 1048104k total, 1039148k used, 8956k free CPUs: 4 @ 2799MHz > > NAME STATE CPU(sec) CPU(%) MEM(k) MEM(%) MAXMEM(k) > > MAXMEM(%) VCPUS NETS NETTX(k) NETRX(k) SSID > > Domain-0 -----r 1170 109.3 885948 84.5 no limit > > n/a 4 8 0 0 0 > > vm_apache ------ 690 72.4 131068 12.5 139264 > > 13.3 2 1 1196352 31262 0 > > Am Mittwoch, den 08.03.2006, 12:52 +0100 schrieb Philipp Jggi: > > > > > > Did you recoded the xentop output during your test? How much mem-max > > > do you have for dom0 and your domU? > > > > > > bye Philipp > > > > > > > > > > > > > > > Artur Schiefer <aschiefer@xxxxxx> > > > Sent by: > > > xen-users-bounces@xxxxxxxxxxxxxxxxxxx > > > > > > 03/08/2006 12:47 PM > > > Please respond to > > > aschiefer@xxxxxx > > > > > > > > > > > > > > > To > > > xen-users > > > <xen-users@xxxxxxxxxxxxxxxxxxx> > > > cc > > > > > > Subject > > > [Xen-users] Slow > > > domU network > > > > > > > > > > > > > > > > > > > > > > > > > > > hello, > > > > > > when i test network performance between dom0 <-> domU (xen 3.0.1tha3 > > > debian patches)with iperf i get only about 450 Mbits of throughput and > > > lots of dropped packets on the vif-interface (bridged). In opposite to > > > that, when i run the same test beetween two dom0 with bonded/teamed > > > gigabit-nics i am able to achieve 1.6 Gbits of throughput. > > > has someone made this obsevation as well (what is your throughput)? > > > any solutions ? > > > > > > cheers, > > > artur > > > > > > > > > > > > > > > _______________________________________________ > > > Xen-users mailing list > > > Xen-users@xxxxxxxxxxxxxxxxxxx > > > http://lists.xensource.com/xen-users > > > > > > > > > _______________________________________________ > > Xen-users mailing list > > Xen-users@xxxxxxxxxxxxxxxxxxx > > http://lists.xensource.com/xen-users > --- Begin Message --- _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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